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Polarisability and Fajan's Rule

Which has max...

Question

Which has maximum covalent character ?

A

N a C l

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B

{S i C l}_{4}

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C

K C l

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D

{M g C l}_{2}

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Solution

The correct option is B ${S i C l}_{4}$
Polarisation in the molecule increases with increase of charge and decreases in size of thecation when the anion is same

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Similar questions

Q. Arrange the following in increasing order of covalent character:

N a C l, M g C l_{2}, A l C l_{3}

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Q. Which has maximum covalent character?
1. NaCl 2.SiCl4 3.AlCl3 4.MgCl2

Isn't SiCl4 the answer? Because covalent character is inversely proportional to polarisation and polarisation is inversely proportional to size of the atom. Since out if these, Si is the largest in is have the least polarisation and thus will result in the highest covalent character.

is this correct? If not, why not?

Q. Arrange the following in the order given below :

Increasing covalent character of

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A l {C l}_{3} < M g {C l}_{2} < N a C l

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If true enter 1, else enter 0.

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has more covalent character than

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